R5 vs R6 vs R7 Ceiling Insulation: Which Is Best for Canberra?
The R-value you choose changes comfort, running costs and rebate eligibility. Here's how the three common options compare for ACT homes.
Canberra's trusted, EEC-certified insulation experts
House Insulation Canberra is a local, family-run team that has upgraded ceilings, walls and underfloors in over 1,000 Canberra homes. Honest advice, price-matched quotes, and help accessing ACT rebates of up to $2,500 plus low-interest loans.
Every quote is written, itemised and free.
Professionally, friendly and reliable. All of the things you want in a trade. House Insulation Canberra was a dream to deal with. They were well priced, punctual and easy to deal with. They explained everything thoroughly and gave us honest advice. [...] Their work has made a huge difference in our home, and we can't wait to live much more comfortably now thanks to their work.
1,000+ Canberra homes insulated
Energy Efficiency Council certified installers
Low-interest loans via ACT Government schemes
$2,500 rebates available for eligible ACT households
Price-match guarantee on written quotes
Most Canberra homes built before 1997 have little or no ceiling insulation. Up to 35% of your heat is disappearing through the roof, and your roof space is hitting 50°C on a summer afternoon before that heat radiates
back down into your bedrooms.
A proper ceiling and underfloor upgrade saves the average Canberra household $400 to $418 a year on energy bills. Heating and cooling
costs drop by 30% to 50%. Over the life of the insulation, you cut roughly
23 tonnes off your home's carbon footprint.
That's the numbers side. The everyday life side? Bedrooms that hold
their temperature overnight, floorboards that aren't freezing in July, and
a house that doesn't need the heater cranking from 5am.
I obtained three quotes before deciding who to go with, and they offered the best overall combination of value, service and professionalism. They were very competitively priced, but what really stood out was the service. [...] Rather than pushing the most expensive option, they recommended what made sense for the different roof arrangements.
Old, degraded, dust-caked or vermin-affected batts safely removed, with the roof space thoroughly vacuumed before new insulation goes in.
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Retrofitted under timber floors to stop the cold rising through the boards in winter. Common fix for older Canberra homes with subfloor space.
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Existing insulation topped up or replaced to lift your home to current R-value standards. Often eligible for ACT Government rebates or low-interest loans.
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Specially designed insulation batts installed into existing uninsulated walls, with installation methods tailored to the home’s wall construction.
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Premium Australian-made batts installed to Canberra-appropriate R-values. Best single upgrade for most homes given how much heat moves through the ceiling.
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Full ceiling assessment and upgrade to meet ACT rental property insulation standards. Documentation supplied for your records.
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Every installation includes a check around downlights, wiring and roof fittings. If we spot an issue, we tell you before we install.
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We help you access the ACT Sustainable Household Scheme and Home Energy Support Program rebates and low-interest loans.
Learn moreNot sure what your home needs? That's what the free in-home assessment is for.
Book My Free AssessmentEvery completed job comes with before-and-after photos of your roof space and full installation documentation. A few recent examples:
Original 1970s batts removed, roof space vacuumed, two-layer install to a high R-rating across 300m².
56 years of accumulated dust and degraded insulation removed. New ceiling batts installed the same day.
Full ceiling upgrade to meet the new ACT rental compliance regulations, with pre-installation electrical safety check.
Two separate roof spaces assessed and specced individually. Different R-values used to match each section.
Underfloor insulation retrofitted to solve cold floorboards through winter.
Old ceiling batts removed and replaced with premium Bradford Gold, gaps filled properly around downlights and fittings.
After 40 years of old insulation Tom and his team removed the old batts, thoroughly vacuumed the roof space and reinsulated the 300m2 of ceiling space with two layers of insulation resulting in a R7 rating! The change in our home has been amazing. We would recommend House Insulation Canberra for your insulation work. On time, fair price and excellent work.
If your existing insulation is fine, we'll tell you. If a mid-range option makes more sense than a premium one for your roof, that's what we'll quote. We won't push you into a higher-spec product you don't need.
Get a written quote from another qualified installer and we'll match it. You get our workmanship and service without paying a premium.
Most jobs are installed within one to two weeks of accepting your quote. Rental compliance work is often booked within the week.
Every job starts with a pre-installation check around downlights, wiring and roof fittings before a single batt goes in.
We don't use backpackers or subcontractors picked up for the day. Trained installers who know Canberra homes and the R-values that actually work for this climate.
As an approved supplier under the ACT Sustainable Household Scheme and Home Energy Support Program, we help eligible households access rebates up to $2,500 for ceiling insulation and Government-backed low-interest loans.
Before-and-after photos, product specs, R-values installed, and safety sign-off. Handy for resale, insurance, or rental compliance records.
Booked House Insulation come to remove our old ceiling insulation along with the 56 years worth of dust that our ceiling had collected.. Tom and Ellie arranged a quote which was the cheapest we found locally for removal and booked us in within a week. On the day they guys were very professional and quick. Cleaned the ceiling within 2 hours [...]
Dom or one of the team visits your home, inspects the existing insulation, checks the roof space and subfloor, and asks about the rooms you're finding hardest to heat or cool.
You get a clear, itemised quote covering products, R-values, removal costs if needed, and any electrical work required. If you've already got a written quote from another qualified installer, bring it and we'll price-match. We'll also tell you what rebates you may be eligible for.
Once you're happy with the quote, we lock in a date, usually within one to two weeks. Rental compliance jobs can often go in sooner.
Electrical safety check first. Old insulation removed and roof space vacuumed if that's part of the job. New batts installed neatly around every fitting. Before-and-after photos, product documentation and safety sign-off handed to you on completion.
From my first email communication to the completion of the installation, the whole process went very smoothly and professionally. [...] Importantly, they listened to our needs and were able to offer a competitive price point. The installation process went well and we were pleased with the photo updates and prompt communication.
I'm Tom, and along with Dom I run House Insulation Canberra. We're a local team of Energy Efficiency Council certified installers, and we've now insulated more than 1,000 homes across the ACT and surrounding region.
You'll deal with me or Ellie from the first call through to the final invoice. Dom is a builder by background, and he does all our in-home assessments. You can count on him for frank advice about what will make the most difference in your home. The install team is our own crew, not subcontractors picked up for the day. When we quote a job, we do the job.
The reason we're upfront about what your home actually needs, and the reason we price-match, is simple: there are a handful of insulation companies in Canberra and we know you're comparing. We'd rather win your job on honest advice and a fair price than talk you into something you don't need.
If your existing insulation is fine, I'll tell you it's fine. If a mid-tier batt does the job better than a top-shelf one for your particular roof, that's what I'll recommend.
Tom was so professional & very responsive to our queries & requirements. Their team on site were also very friendly, experienced & professional. We highly recommend this company to others as they provide value for money with a smile & they even show up early which is rare.
We service homes across Canberra and the surrounding region.
Braddon • Turner • Lyneham • Downer • Dickson O'Connor • Ainslie • Watson • Hackett • Gungahlin Palmerston • Ngunnawal • Nicholls • Amaroo • Harrison • Bonner • Casey.
Belconnen • Aranda • Cook • Macquarie • Hawker Weetangera • Page • Scullin • Higgins • Holt • Latham • Florey • Melba • Evatt • Kaleen • Giralang • Bruce
Curtin • Hughes • Garran • Deakin • Yarralumla, Lyons • Chifley • Pearce • Torrens • Farrer • Mawson • Weston • Holder • Duffy • Chapman • Rivett • Stirling
Kambah • Wanniassa • Fadden • Erindale • Isabella Plains • Monash • Calwell • Theodore • Banks • Conder • Gowrie • Bonython • Greenway
Kingston • Griffith • Narrabundah • Red Hill • Forrest • Barton • Manuka • Wright • Coombs • Denman Prospect • Whitlam
Queanbeyan • Jerrabomberra • Karabar • Googong
Don't see your suburb? Give us a call on 02 5850 8562.
Call 02 5850 8562
Great communication, service and price. Would highly recommend if you're looking in Canberra :)
For most standard Canberra homes, ceiling insulation upgrades sit somewhere between $2,500 and $6,500 depending on ceiling area, R-value chosen, and whether old batts need removal first. Underfloor is priced separately. Every quote is written, itemised and free. Eligible households can access rebates up to $2,500 through the ACT Home Energy Support Program.
Most standard ceiling jobs are finished in a single visit. Where old insulation has to come out first, the removal, vacuuming and new install are usually completed the same day, as on the Belconnen family home above. Your written quote confirms the timing for your home.
Most jobs are installed within one to two weeks of accepting your quote, and rental compliance work is often booked within the week. Once you're happy with the quote, we lock in a date.
Honest advice: if your existing insulation is fine, we'll tell you, and we quote the option that makes sense for your roof rather than the most expensive one. A price-match guarantee on written quotes from other qualified installers. Our own crew of Energy Efficiency Council certified installers, not subcontractors picked up for the day. An electrical safety check before a single batt goes in, and full documentation on completion.
As an approved supplier under the ACT Sustainable Household Scheme and Home Energy Support Program, we help eligible households access rebates of up to $2,500 for ceiling insulation and Government-backed low-interest loans. Eligibility depends on the current scheme rules, so tell us about your household at the assessment and we'll outline what applies to you and handle the paperwork.
If existing insulation is degraded, damp, contaminated or patchy, removal and vacuuming give the best outcome. If it’s clean and even, a top-up layer may be appropriate — we’ll advise after inspection.
Yes. We carry out a full ceiling assessment and upgrade to meet ACT rental property insulation standards, with a pre-installation electrical safety check. Our assessment reports and completion photos are designed for property managers and landlords, and we liaise directly with tenants to arrange the visits.
FROM THE BLOG
Practical guides on insulation, rebates and keeping your Canberra home comfortable all year.
The R-value you choose changes comfort, running costs and rebate eligibility. Here's how the three common options compare for ACT homes.
Eligible ACT households can claim up to $2,500 towards ceiling insulation. Who qualifies, how to apply, and what we handle for you.
Cold floorboards are a Canberra classic. We look at what underfloor insulation actually changes, what it costs and when it pays off.
Book a free in-home assessment. One of the team will inspect your ceiling and subfloor, explain your options in plain English, and send you a written, itemised quote.
It's refreshing to deal with a company that's focused on giving good advice and good service rather than upselling. I wouldn't hesitate to recommend Home Insulation Canberra to anyone.